drm/amd/display: Add amdgpu_dm_crtc_init tests

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why:
amdgpu_dm_crtc_init builds a CRTC with its primary and cursor planes,
resets its state, and records it in mode_info, but had no coverage for
either the default or the degamma-enabled configuration path.

how:
Add dm_test_crtc_init_registers_crtc for the default (has_degamma == false)
path and dm_test_crtc_init_enables_degamma for the DCN DPP (has_degamma ==
true) path. Both set up an adev, dc with ctx, and a primary plane, call
amdgpu_dm_crtc_init, and verify it returns 0, registers the CRTC, and
initializes the expected fields, then tear down the reset state, CRTC, and
cursor plane the function allocated. The remaining branches are allocation
failures and unreachable defensive paths not drivable under KUnit.

Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Bhawanpreet Lakha 2026-07-23 17:19:03 -04:00 • committed by Alex Deucher

parent 355aa2dbf0

commit 604a3017dd

2 changed files with 122 additions and 0 deletions

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1

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c

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121

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_crtc_test.c

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